ISSUED DATE :2006/01/26 REVISED DATE : GT2133 C M O S P o s i t i v e Vo l t a g e R eg u l a t o r Description The GT2133 series of positive, linear regulators feature low quiescent current (30 A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-26 package is attractive for “Pocket” and “Hand Held” applications. This rugged device has both Thermal Shutdown, and Current Fold-back to prevent device failure under the “Worst” of operating conditions. An additional feature is a “Power Good” detector, which pulls low when the output is out of regulation. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and ground. The GT2133 is stable with an output capacitance of 2.2 F or greater. Features Very Low Dropout Voltage Guaranteed 300mA output Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Typical Accurate± 1.5% Noise Reduction Bypass Capacitor Power-saving Shutdown Mode Power Good Detector Factory Pre-set Output Voltages Low Temperature coefficient Functional Block Diagram Applications Battery Powered Widgets Instrumentation Wireless Devices PC Peripherals Portable Electronics Cordless Phones Electronic Scales Package Dimensions REF. A B C D E F Millimeter Min. Max. 2.70 3.10 2.60 3.00 1.40 1.80 0.30 0.55 0 0.10 0° 10° REF. G H I J K L Dimensions Millimeter 1.90 REF. 1.20 REF. 0.12 REF. 0.37 REF. 0.60 REF. 0.95 REF. Typical Application Circuit 1/7 ISSUED DATE :2006/01/26 REVISED DATE : Absolute Maximum Ratings Parameter Input Max Voltage Output Current Input, Output Voltage Operating Ambient Temperature Junction Temperature Maximum Junction Temperature Thermal Resistance Power Dissipation( T=100 ) EDS Classification Output Voltage Symbol VOUT (E) Output Current Current Limit Load Regulation IO ILIM REGLOAD Dropout Voltage VDROPOUT Quiescent Current Ground Pin Current Line Regulation Input Voltage Over Temperature Shutdown Over Temperature Hysterisis Vo Temperature Coefficient Short Circuit Current(Note4) Power Supply Rejection Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current Shutdown Output Voltage Ratings Unit VIN IOUT 8 PD/( VIN- VO) GND-0.3 to VIN+0.3 -40 ~ +85 -40 ~ +125 150 260 380 B V mA V Topr Tj Tj Max ja PD Electrical Characteristics Ta=25 Parameter Symbol (Note1) IQ IGND REGLINE VIN OTS OTH TC ISC unless otherwise noted Condition Min VIN=VOUT(T)+2V, IO=1mA -1.5% VIN=VOUT(T)+2V, VO>1.2 300 - - mA VIN=VOUT(T)+2V, VO>1.2 VIN=VOUT(T)+2V, IO=1mA to 300mA 1.2V VOUT(T) 2.0V IO=300mA 2.0V<VOUT(T) 2.8V VO=VOUT(E)-2% 2.8V<VOUT(T) VIN= VOUT(T)+1V, IO=0mA 300 -1 - 450 0.2 - 1 1300 mA % - - 400 mV - 30 300 50 A VIN= VOUT(T)+2V, IO=1mA~300mA 1.2V VOUT(T) 1.4V IO=1mA VIN=VOUT(T)+1 to 1.4V<VOUT(T) 2.0V VOUT(T)+2 2.0V<VOUT(T)<4 4.0V VOUT(T) -0.2 -0.15 -0.1 -0.4 Note3 - 35 0.02 0.2 150 0.2 0.15 0.1 0.4 7 - VIN=VOUT(T)+1V, VO<0.8V - 30 30 150 300 PSRR VIN=VOUT(T)+2V Io=100mA Co=2.2 F eN f=10Hz~100kHz Io=10mA VEH VEL IEH IEL ISD VO,SD Output Under Voltage VUV Output Over Voltage VOV PG Leakage Current PG Voltage Rating PG Voltage Low ILC VPG VOL /W mW TYP VOUT(T) (Note2) Max Unit 1.5% V A % V ppm/ mA f=1kHz - 50 - f=10kHz f=100kHz - 20 15 - dB Co=2.2 F - 30 - Vrms 2.0 0 0 115 125 - 0.5 - VIN 0.4 0.1 0.5 1 0.4 85 75 1 7 0.4 V V A A A V VIN=2.7V to 7V VIN=2.7V to 7V VEN=VIN, VIN=2.7V to 7V VEN= 0V, VIN=2.7V to 7V VIN=5V, VO=0V, VEN<VEL Io=0.4mA, VEN<VEL 2.5V VOUT(T) 5.0V 1.2V VOUT(T)<2.5V 2.5V VOUT(T) 5.0V 1.2V VOUT(T)<2.5V VPG=7V VO in regulation ISINK=0.4mA % VOUT(T) % VOUT(T) A V V Note 1: V OUT (E) =Effective Output Voltage (i.e. the output voltage when “VOUT (T) + 2.0V” is provided at the VIN pin while maintaining a certain IOUT value). 2: VOUT (T) =Specified Output Voltage 3: VIN (MIN) =VOUT+VDROPOUT 4: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be applied before a current source load is applied. 2/7 ISSUED DATE :2006/01/26 REVISED DATE : Ordering Information ( contd. ) Part Number GT2133-15 GT2133-25 GT2133-28 GT2133-30 GT2133-33 GT2133-35 GT2133-37 GT2133-2H Marking 3C152 XXXX 3C252 XXXX 3C282 XXXX 3C302 XXXX 3C332 XXXX 3C352 XXXX 3C372 XXXX 3C2H2 XXXX Output Voltage Part Number 1.5V GT2133-18 2.5V GT2133-27 2.8V GT2133-29 3.0V GT2133-31 3.3V GT2133-34 3.5V 3.7V GT2133-36 GT2133-38 Marking 3C182 XXXX 3C272 XXXX 3C292 XXXX 3C312 XXXX 3C342 XXXX 3C362 XXXX 3C382 XXXX Output Voltage 1.8V 2.7V 2.9V 3.1V 3.4V 3.6V 3.8V 2.85V Detailed Description The GT2133 family of COMS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown and Power Good detection circuitry. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds 150 , or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120 . The GT2133 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The GT2133 also incorporates current fold-back to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts. External Capacitors The GT2133 is stable with an output capacitance to ground of 2.2 F or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1 F ceramic capacitor with a 10 F Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1 F to have a beneficial effect. A third capacitor can be connected between the BY-Pass pin and Gnd. This capacitor can be a low cost Polyester Film variety between the value 0.001 ~ 0.01uF. A large capacitor improves the AC ripple rejection, but also makes the output come up slowly. This “Soft” turn-on is desirable in some applications to limit turn-on surges. All capacitors should be placed in close proximity to the pins. A “Quiet” ground termination is desirable. This can be achieved with a “Star” connection. Enable The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1 A. This pin behaves much like an electronic switch. Power Good The GT2133 includes the Power Good feature. When the output is not within ±15% of the specified voltage, it pulls low. This can occur under the following conditions: 1) Input Voltage too low. 2) During Over-Temperature. 3) During Over-Current. 4) If output is pulled up. (Note: PG pin is an open-drain output.) 3/7 ISSUED DATE :2006/01/26 REVISED DATE : Characteristics Curve 4/7 ISSUED DATE :2006/01/26 REVISED DATE : 5/7 ISSUED DATE :2006/01/26 REVISED DATE : 6/7 ISSUED DATE :2006/01/26 REVISED DATE : Important Notice: All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM. GTM reserves the right to make changes to its products without notice. GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems. GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office And Factory: Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C. TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785 China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165 7/7